CN220869562U - Cooling system - Google Patents

Abstract

The utility model provides a cooling system, which is used for cooling a hydroelectric generating set and comprises: the side wall of the pressure steel pipe is provided with a water intake and a water return port, and liquid flows in the pressure steel pipe; one end of the cooling pipeline is communicated with the water intake, and the other end of the cooling pipeline is communicated with the water return port; the cooling component is communicated with the cooling pipeline and is used for cooling the hydroelectric generating set; and the main circulating water pump is arranged on the cooling pipeline to drive the liquid in the cooling pipeline to flow. The technical scheme provided by the utility model can solve the problems of higher cost and higher energy consumption of the hydroelectric generating set in the prior art in the cooling process.

Description

Cooling system

Technical Field

The utility model relates to the technical field of cooling systems, in particular to a cooling system.

Background

At present, the hydroelectric generating set is required to be cooled in the power generation process, so that the hydroelectric generating set can work normally. In the prior art, when the water turbine generator set is cooled, a method of pressurizing a centrifugal water pump motor is generally adopted, namely, after water in a water supply tank works on the water turbine generator set, the water is discharged through a draft tube, the centrifugal water pump pressurizes the water discharged from the draft tube into a cooler, and the cooler cools the water turbine generator set. However, since the centrifugal water pump needs to be filled with water before operation, the water filling port of the centrifugal water pump needs to be lower than the tail water level. Therefore, in the actual production process, an underground factory building for placing the centrifugal water pump needs to be dug out in a working area so as to ensure the height difference between the water injection port of the centrifugal water pump and the tail water level. However, this arrangement increases the labor intensity of the worker and increases the production cost, and at the same time, consumes excessive electric power during the cooling process.

Disclosure of utility model

The utility model provides a cooling system, which aims to solve the problems of higher cost and higher energy consumption of a hydroelectric generating set in the prior art in the cooling process.

The utility model provides a cooling system, which is used for cooling a hydroelectric generating set and comprises: the side wall of the pressure steel pipe is provided with a water intake and a water return port, and liquid flows in the pressure steel pipe; one end of the cooling pipeline is communicated with the water intake, and the other end of the cooling pipeline is communicated with the water return port; the cooling component is communicated with the cooling pipeline and is used for cooling the hydroelectric generating set; and the main circulating water pump is arranged on the cooling pipeline to drive the liquid in the cooling pipeline to flow.

Further, the water intake and the water return port are positioned at the same height.

Further, along the flowing direction of the liquid, the water return port is positioned at the downstream of the water intake.

Further, the cooling assembly includes a plurality of cooling units disposed in parallel, and the cooling circuit includes: one end of the water intake pipe is communicated with the water intake, and the other end of the water intake pipe is communicated with the plurality of cooling units; one end of the water return pipe is communicated with the plurality of cooling units, and the other end of the water return pipe is communicated with the water return port.

Further, the cooling system further includes a water filter disposed on the cooling line, and the water filter is disposed upstream of the cooling assembly.

Further, the plurality of cooling units all include connecting pipe, cooler and two first valves, and cooler and two first valves all set up on the connecting pipe, and the one end and the intake pipe intercommunication of connecting pipe, the other end and the wet return intercommunication of connecting pipe, and two first valves set up the both sides at the cooler respectively.

Further, be provided with first motorised valve and second motorised valve on the cooling pipeline, first motorised valve sets up between water purifier and main circulating water pump, and the second motorised valve sets up between main circulating water pump and cooling module.

Further, a second valve is arranged on the water intake pipe, and a third valve is arranged on the water return pipe.

Further, the cooler is a coil structure.

Further, the cooling system further comprises a secondary circulating water pump, and the secondary circulating water pump is connected with the main circulating water pump in parallel.

By applying the technical scheme of the utility model, one end of the cooling pipeline is communicated with the water intake, the other end of the cooling pipeline is communicated with the water return port, the cooling assembly is communicated with the cooling pipeline, and the main circulating water pump can drive liquid in the cooling pipeline to flow so that the cooling assembly can cool the hydroelectric generating set. The water intake and the water return port are both positioned on the pressure steel pipe, and the height of the water intake is higher than that of the draft tube, so that the power of the main circulating water pump in working is lower than that of the centrifugal water pump, and the electric energy consumed by the main circulating water pump in working can be reduced. So set up, can avoid using pressure device such as centrifugal water pump to can simplify the equipment step, avoid digging underground factory building in the work area, reduce staff's intensity of labour, can reduce the energy consumption simultaneously, reduction in production cost. Meanwhile, the cooling pipeline and the cooling assembly are arranged in an open mode, and workers can maintain and replace the cooling pipeline and the cooling assembly conveniently.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 shows a schematic structural diagram of a cooling system provided according to an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a pressure steel pipe; 11. a water intake; 12. a water return port;

20. A cooling pipeline; 21. a water intake pipe; 22. a water return pipe;

30. A cooling assembly; 31. a cooling unit; 311. a connecting pipe; 312. a cooler; 313. a first valve;

41. A main circulating water pump; 42. a secondary circulating water pump;

50. A water filter;

61. A first electrically operated valve; 62. a second electrically operated valve; 63. a second valve; 64. a third valve; 65. a third electrically operated valve; 66. and a fourth electrically operated valve.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the present application provides a cooling system for cooling a hydro-generator set, the cooling system including a penstock 10, a cooling line 20, a cooling module 30, and a main circulation water pump 41. The sidewall of the penstock 10 is provided with a water intake 11 and a water return 12, and the penstock 10 has liquid flowing therein. One end of the cooling pipeline 20 is communicated with the water intake 11, and the other end of the cooling pipeline 20 is communicated with the water return 12. The cooling assembly 30 is communicated with the cooling pipeline 20, and the cooling assembly 30 is used for cooling the water turbine generator set. A main circulation water pump 41 is provided on the cooling line 20 to drive the flow of liquid in the cooling line 20. The hydraulic pressure pipe 10 is characterized in that one end of the pressure pipe 10 is provided with a water inlet, the other end of the pressure pipe 10 is provided with a water outlet, the water inlet is communicated with the front of a reservoir dam or a pressure regulating well, the water outlet is communicated with a water turbine generator set, and the front of the reservoir dam or the pressure regulating well supplies liquid to the water turbine generator set through the pressure pipe 10 so as to drive the water turbine generator set to work.

By applying the technical scheme of the application, one end of the cooling pipeline 20 is communicated with the water intake 11, the other end of the cooling pipeline 20 is communicated with the water return 12, the cooling assembly 30 is communicated with the cooling pipeline 20, and the main circulating water pump 41 can drive liquid in the cooling pipeline 20 to flow so that the cooling assembly 30 can cool the water turbine generator set. Since the water intake 11 and the water return 12 are both located on the penstock 10, the height of the water intake 11 is higher than that of the draft tube, so that the power of the main circulating water pump 41 is lower than that of the centrifugal water pump when in operation, and the electric energy consumed by the main circulating water pump 41 when in operation can be reduced. So set up, can avoid using pressure device such as centrifugal water pump to can simplify the equipment step, avoid digging underground factory building in the work area, reduce staff's intensity of labour, can reduce the energy consumption simultaneously, reduction in production cost. Meanwhile, the cooling pipeline 20 and the cooling assembly 30 are laid in an open mode, and maintenance and replacement of the cooling pipeline 20 and the cooling assembly 30 are facilitated for workers.

In the prior art, because the installation position of the centrifugal water pump is lower, the installation height of the centrifugal water pump is generally about 6m lower than the tail water level, the lift of the centrifugal water pump is required to be increased for guaranteeing the cooling water flow at the upper part of the water turbine generator set, the cooling water pressure is 0.4Mpa, the design cooling flow is not less than 500m ³/h, and the power requirement for the distribution of the centrifugal water pump is about 132 kW. The centrifugal water pump will consume approximately 46.2 kW/h of electrical energy, calculated as 3500 hours of annual operation of the hydroelectric generating set. In the present application, however, the pressure difference between the intake 11 and the return 12 is about 0.1Mpa. Wherein, the pump power P=ρ gHQ, ρ is the density of the liquid delivered by the pump, g is the gravity acceleration, H is the pump lift, Q is the pump flow, and the pressure of the cooling water is positively correlated with the pump lift. Therefore, the main circulation water pump 41 can save 75% of energy with the flow rate of the pump unchanged, and the theoretical calculation main circulation water pump 41 is set with the power consumption: 132kW-132kW x 0.75=27.5 kW, the energy saving is calculated as 3500 hours of annual operation; 132kW x 3500 x 0.75=34.65 kW/h.

Specifically, the water intake 11 and the water return 12 are located at the same height. So set up, according to the principle of intercommunication ware, only need set up main circulating water pump 41 on cooling line 20 and can drive the liquid flow, simple structure is convenient for process, is convenient for drive liquid flow simultaneously.

Further, in the flow direction of the liquid, the water return port 12 is located downstream of the water intake port 11. After cooling the water turbine generator set by the cooling water taken out of the pressure steel pipe 10, backwater is returned to the pressure steel pipe 10, and work is performed on the water turbine generator set again so as to drive the water turbine generator set to work. Specifically, in the prior art, the water inlet of the penstock 10 is higher than the water outlet, so that the flow rate of the liquid is gradually increased, and the pressure at the corresponding position is reduced as the flow rate of the liquid is increased, so that the circulation of the liquid in the cooling pipeline 20 is further facilitated, and the power of the main circulating water pump 41 is further reduced.

Specifically, the penstock 10 includes a horizontal section and a vertical section, and in the present application, the intake 11 and the return 12 are located on the horizontal section, so that the intake 11 and the return 12 are easily processed. Optionally, the water intake 11 and the water return 12 may be located on the vertical section, where the water intake 11 and the water return 12 are located at the same height, and the water intake 11 and the water return 12 are arranged symmetrically about the center line of the penstock 10, so that interference generated when the cooling pipeline 20 is communicated with the water intake 11 and the water return 12 can be avoided.

The cooling assembly 30 includes a plurality of cooling units 31 disposed in parallel, and the cooling pipeline 20 includes a water intake pipe 21 and a water return pipe 22. One end of the water intake pipe 21 communicates with the water intake 11, and the other end of the water intake pipe 21 communicates with the plurality of cooling units 31. One end of the return pipe 22 communicates with the plurality of cooling units 31, and the other end of the return pipe 22 communicates with the return water port 12. So set up, a plurality of cooling units 31 can cool down hydroelectric set's different components to guarantee cooling assembly 30 to hydroelectric set's cooling effect, thereby improve hydroelectric set's reliability of work, guarantee hydroelectric set can normally work.

Specifically, in the present application, the cooling assembly 30 includes five cooling units 31 arranged in parallel, which respectively cool the upper guide bearing, the stator and the rotor, the thrust bearing, the lower guide bearing and the guide bearing bush of the hydro-generator set, and the upper guide bearing, the stator and the rotor, the thrust bearing, the lower guide bearing and the guide bearing bush of the hydro-generator set can generate a large amount of heat during working, so that the normal working of the hydro-generator set can be ensured.

Further, the cooling system further comprises a water filter 50, the water filter 50 being arranged on the cooling circuit 20, and the water filter 50 being arranged upstream of the cooling assembly 30. So set up, water filter 50 can filter the water in the water intake pipe 21 to can avoid impurity in the water to influence the normal circulation of water, and then can guarantee the cooling effect of cooling unit 31, can reduce simultaneously to cooling line 20 and cooling module 30's maintenance and washing.

Specifically, each of the plurality of cooling units 31 includes a connection pipe 311, a cooler 312, and two first valves 313. The cooler 312 and the two first valves 313 are both provided on the connection pipe 311, one end of the connection pipe 311 is communicated with the water intake pipe 21, the other end of the connection pipe 311 is communicated with the water return pipe 22, and the two first valves 313 are respectively provided at both sides of the cooler 312. So set up, be convenient for adjust the flow of the cooling water in the cooler 312, when one of them first valve 313 damage the back, cooling unit 31 still can use, so set up, can improve the reliability of cooling unit 31.

Wherein, be provided with first motorised valve 61 and second motorised valve 62 on the cooling circuit 20, first motorised valve 61 sets up between water purifier 50 and main circulating water pump 41, and second motorised valve 62 sets up between main circulating water pump 41 and cooling module 30. By such arrangement, the flow rates upstream and downstream of the main circulation water pump 41 can be adjusted conveniently, and the degree of automation of the cooling system can be improved. At the same time, maintenance of the main circulation water pump 41 is facilitated.

Further, the water intake pipe 21 is provided with a second valve 63, and the water return pipe 22 is provided with a third valve 64. So set up, the staff can control the velocity of flow of intake pipe 21 and wet return 22 respectively through first valve 313 and second valve 63 to guarantee cooling system's normal work, improve cooling system's reliability.

Specifically, the coolers 312 are in a coil structure, and the coolers 312 in the five cooling units 31 are respectively arranged close to an upper guide bearing, a stator and a rotor, a thrust bearing, a lower guide bearing and a guide bearing bush of the hydroelectric generating set. By the arrangement, the cooling effect of the cooler 312 can be improved, and meanwhile, the device is simple in structure and convenient to process.

Further, the cooling system further includes a sub-circulation water pump 42, and the sub-circulation water pump 42 is disposed in parallel with the main circulation water pump 41. So set up, when main circulating water pump 41 breaks down, secondary circulating water pump 42 can work as the standby machine to guarantee cooling system's normal operating, improve cooling system cooling in-process reliability.

Wherein, cooling system still includes connecting line, third motorised valve 65 and fourth motorised valve 66, connecting line and intake pipe 21 intercommunication, connecting line's one end sets up between water purifier 50 and first motorised valve 61, connecting line's the other end sets up between second motorised valve 62 and cooling module 30, sub-circulating water pump 42, third motorised valve 65 and fourth motorised valve 66 set up on the connecting line, so set up, can further improve cooling system's degree of automation, be convenient for maintain sub-circulating water pump 42.

Specifically, in the application, the pressure bearing range of each device in the cooling system is 1.5 times greater than the pressure of the water inlet of the water turbine generator set, so that the normal operation of the cooling system is ensured. The first electrically operated valve 61, the second electrically operated valve 62, the second valve 63, the third valve 64, the third electrically operated valve 65, and the fourth electrically operated valve 66 are all normally open valves.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A cooling system for cooling a hydro-generator set, the cooling system comprising:

The pressure steel pipe (10), a water intake (11) and a water return port (12) are arranged on the side wall of the pressure steel pipe (10), and liquid flows in the pressure steel pipe (10);

The cooling pipeline (20), one end of the cooling pipeline (20) is communicated with the water intake (11), and the other end of the cooling pipeline (20) is communicated with the water return port (12);

The cooling assembly (30) is communicated with the cooling pipeline (20), and the cooling assembly (30) is used for cooling the hydroelectric generating set;

And a main circulating water pump (41) arranged on the cooling pipeline (20) for driving the liquid in the cooling pipeline (20) to flow.

2. The cooling system according to claim 1, characterized in that the water intake (11) and the return water intake (12) are located at the same height.

3. A cooling system according to claim 1, characterized in that the return water opening (12) is located downstream of the water intake opening (11) in the flow direction of the liquid.

4. The cooling system according to claim 1, wherein the cooling assembly (30) comprises a plurality of cooling units (31) arranged in parallel, the cooling circuit (20) comprising:

A water intake pipe (21), one end of the water intake pipe (21) is communicated with the water intake (11), and the other end of the water intake pipe (21) is communicated with a plurality of cooling units (31);

And one end of the water return pipe (22) is communicated with a plurality of cooling units (31), and the other end of the water return pipe (22) is communicated with the water return port (12).

5. The cooling system according to claim 1, further comprising a water filter (50), the water filter (50) being arranged on the cooling line (20) and the water filter (50) being arranged upstream of the cooling assembly (30).

6. The cooling system according to claim 4, wherein the plurality of cooling units (31) each include a connection pipe (311), a cooler (312), and two first valves (313), the cooler (312) and the two first valves (313) are each provided on the connection pipe (311), one end of the connection pipe (311) communicates with the water intake pipe (21), the other end of the connection pipe (311) communicates with the water return pipe (22), and the two first valves (313) are provided on both sides of the cooler (312), respectively.

7. The cooling system according to claim 5, characterized in that a first electrically operated valve (61) and a second electrically operated valve (62) are provided on the cooling line (20), the first electrically operated valve (61) being provided between the water filter (50) and the main circulation water pump (41), the second electrically operated valve (62) being provided between the main circulation water pump (41) and the cooling assembly (30).

8. The cooling system according to claim 4, characterized in that the water intake pipe (21) is provided with a second valve (63) and the water return pipe (22) is provided with a third valve (64).

9. The cooling system of claim 6, wherein the cooler (312) is a coil structure.

10. The cooling system according to claim 5, characterized in that the cooling system further comprises a secondary circulation water pump (42), the secondary circulation water pump (42) being arranged in parallel with the primary circulation water pump (41).